Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bdf2b002450729008b85f2f1c48963d5cfacefdeb41646a8d7d14a2b90b08ea' 
  AND token = '9Vl/Hjgrgitmcp87JekJaOTN6j292CoaX9BfAKvUvCo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00053

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}